# US 2014/0189992 A1 · Fluidic product dispenser > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0189992 A1 - Document ID: US20140189992A1 - Status: Published application - Kind: A1 - Application number: 14/207,935 - Filed: 2014-03-13 - Published: 2014-07-10 - Earliest claimed: 2009-10-05 - Assignees: G.A.B. Development & Engineering B.V. - Applicants: G.A.B. Development & Engineering B.V. - Inventors: Wilhelmus Everhardus GANZEBOOM - Web page: https://patentgrep.com/patent/US20140189992A1 ## CPC - B05B 11/1087: {Combination of liquid and air pumps} - A47K 5/1207: {Dispensing from the bottom of the dispenser with a vertical piston} - A47K 5/14: Foam or lather making devices - B05B 7/0031: {with disturbing means promoting mixing, e.g. balls, crowns} - B05B 11/1002: {the direction of the pressure stroke being substantially perpendicular to the major axis of the container (B05B11/1009, B05B11/1015 take precedence)} - B05B 11/1022: {actuated by pressure} - A47K 5/1208: {by means of a flexible dispensing chamber} - B05B 11/1004: {comprising a movable cylinder and a stationary piston} - B05B 11/1015: {actuated without substantial movement of the nozzle in the direction of the pressure stroke (B05B11/1011 takes precedence)} - Y10T 29/4973: Replacing of defective part - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) - A47K: SANITARY EQUIPMENT; ACCESSORIES THEREFOR, e.g. TOILET ACCESSORIES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A dispenser includes a housing holding an assembly, including a liquid reservoir, a pump for dispensing the fluid product, and an outlet nozzle. The pump includes a liquid chamber for containing a dose of the liquid product and a pressurizing device which allows liquid product to be drawn into or expelled from the liquid chamber. The dispenser further includes a shunting chamber including a first aperture allowing flow access to the reservoir, a second aperture allowing flow access to the outlet nozzle, and a third aperture allowing flow access to the liquid chamber. The third aperture is disposed off-axis with respect to the first and second apertures. The shunting chamber further includes a mechanically actuated governing device that has two states, one defining a flow path between the first and third apertures and one defining a flow path between the third and second apertures. ## Claims ### Claim 1 A method of conducting a maintenance operation on a dispenser for dispensing a fluid product, the dispenser comprising a housing for accommodating an assembly, the assembly comprising: a liquid reservoir, for containing a liquid product; a pump, connectable to the reservoir, for dispensing the fluid product using the liquid product as an input; an outlet nozzle, serving to convey and dispense the fluid product from the pump, whereby the pump comprises: a liquid chamber, for containing a dose of the liquid product obtainable from the liquid reservoir, with an associated first compressor that allows liquid product to be drawn into or expelled from the liquid chamber; an air chamber, for containing a dose of air, with an associated second compressor that allows air to be drawn into or expelled from the air chamber, the method comprising: opening the housing; removing used parts comprising at least the liquid reservoir; replacing the removed parts by replacement parts; and closing the housing, whereby, in said removal/replacement operation, at least one of the liquid chamber and air chamber is left in place in the housing, together with its associated compressor. ### Claim 2 (depends on 1) A method according to claim 1, wherein, in said removal/replacement operation, the air chamber is left in place in the housing, together with its associated compressor. ### Claim 3 (depends on 1) A method according to claim 1, wherein the removed parts additionally comprise the outlet nozzle, and the replacement parts additionally comprise a replacement outlet nozzle. ### Claim 4 (depends on 2) A method according to claim 2, wherein the removed parts additionally comprise the outlet nozzle, and the replacement parts additionally comprise a replacement outlet nozzle. ### Claim 5 (depends on 1) A method according to claim 1, wherein the dispenser further comprises a shunting chamber comprising: a first aperture allowing flow access to the liquid reservoir; a second aperture allowing flow access to the outlet nozzle; a third aperture allowing flow access to the liquid chamber; a fourth aperture allowing flow access to the air chamber, whereby the third aperture and fourth apertures are disposed off-axis with respect to the first and second apertures. ### Claim 6 (depends on 4) A method according to claim 4, wherein the removed parts additionally comprise the shunting chamber, and the replacement parts additionally comprise a replacement shunting chamber. ### Claim 7 (depends on 4) A method according to claim 4, wherein the connections between the shunting chamber on the one hand and the liquid and air chambers on the other hand are effected using a mating mechanism selected from the group comprising a pressure fit coupling, a click coupling and a bayonet coupling. ### Claim 8 (depends on 1) A method according to claim 1, wherein the first and second compressors are each chosen from the group comprising a bellows, a balloon, a piston, a membrane and an impeller. ### Claim 9 (depends on 1) A method according to claim 1, wherein: the fluid product is foam; the outlet nozzle comprises a turbulence generating member for generating turbulence in fluid passing therethrough. ### Claim 10 (depends on 1) A method according to claim 1, wherein: the fluid dispensed from the outlet nozzle is a spray; the outlet nozzle comprises a constriction arranged in a flow path of the fluid.